Vertical-axis lift-drag coupled wind turbine for wind power generation

Abstract

The invention discloses a vertical-shaft lift-drag coupled wind turbine for wind power generation. The upper surface of the center of a foundation platform is provided with a vertical shaft; the upper part of the vertical shaft is provided with two bearings; a space between the two bearings is 1 / 3 of the height of a blade; bearing covers cover the two bearings; an outer ring of the each bearing is matched with an inner hole of each bearing cover; a plurality of blades are uniformly distributed along the axial direction of the vertical shaft; each blade is connected with each bearing cover through a support rod to form a wind wheel; each blade has a hollow structure with upper and lower caps; and the upper and lower caps are connected with a movable grid. The vertical-shaft lift-drag coupled wind turbine is reasonable in structure, overcomes defects that a lift type wind turbine cannot be started at a low wind speed and a drag type wind turbine has low wind energy conversion efficiency, solves the problem that a vertical-shaft wind driven generator is not suitable for cities with insufficient wind resources and populated areas with complicated wind conditions, and can greatly improve the wind energy utilization rate of China and promote the development of the wind power industry.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a vertical-axis lift-drag coupled wind turbine suitable for environments with low wind speed or complex wind conditions. Background technique [0002] Utilizing wind energy is one of the effective ways to solve the energy crisis. Existing large-scale wind turbines are divided into two categories, horizontal axis wind turbines and vertical axis wind turbines, according to the installation direction of the wind rotor rotation axis in space. [0003] Compared with horizontal axis wind turbines, vertical axis wind turbines have the advantages of no yaw device, simple blade manufacturing, low start-up wind speed, good safety, low noise, high wind energy capacity per unit area, and easy installation of wind turbines. Simple and transmission components such as gearboxes can be placed on the ground or at the bottom of the tower, which has the advantages of convenient maintenance, lo...

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Problems solved by technology

[0006] The object of the present invention is to provide a vertical axis lift-drag coupled wind power generator with good working performance, which has a reasonable structure, overcomes the disadvantages that the lift-type wind turbine cannot be started at low wind speed, and the drag-type wind turbine has low wind energy conversion efficiency. machine

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